Witnesses identified the three at the hospital, police said. Daniel Ramirez told police that he had punched Dutt, and a bloody knife was found in Vasquez's possession at the hospital, Hayward police Detective John Racette wrote in a report.

Alameda County prosecutors also charged Robert Ramirez with cocaine possession.

The Ramirez brothers and Vasquez are being held without bail at Santa Rita Jail in Dublin. Pacheco, who has a prior conviction for assault with a firearm, is still being sought.